Hone for reconditioning cutters in pencil sharpeners



Feb. 22, 1949. w YA HONE FOR RECONDITIONING CUTTERS IN PENCIL SHARPENERSFiled May 17-, 1948 William H. Fryar Y INVENTOR.

BY M

Patented Feb. 22, 1949 UNITED STATES PATENT FHE HONE FOE RECONDITIONINGCUTTERS IN PENCIL SHARPENERS 4 Claims.

This invention relates to hand tools and implements and has reference,in particular, to a tool which is especially designed and aptlyconstructed to effectively hone and recondition rotary spiral cutterssuch as are embodied in crank operated pencil sharpeners currently inuse.

My primary aim is to provide a simple, practical, up-to-date tool which,after the usual shavings case is removed, may then be temporarily springclamped on and against the cutters and held on the latter, while thecrank is turned counter-clockwise whereby to act on said cutters in amanner to recondition the latter for extended usefulness.

Beyond the immediate design, my tool is an improvement over othersimilarly purposed devices in that it has hingedly supported honeholders which, in applied positions, adapt themselves to effectivelycontact the frusto-conical cutters to the end that effective and uniformresults are repeatedly had.

In carrying out the preferred embodiment of my invention exceeding carehas been exercised to include all worthy requirements so that users willfind their needs fully met.

Pursuant to the above a pair of spring urged, pivotally connected leversare provided and they carry, at their forward ends, opposed holders forhoning stones and said holders are tiltable and substantiallyself-adapting, whereby to accommodate and to properly grip thefrusto-conical cutters.

More specifically, novelty is predicated upon a pair of substantiallyduplicate complemental levers pivotally connected to each otherintermediate the ends of the levers, the stated holders being hingedlymounted on the forward ends of the levers and urged toward each other byspring means interposed between the rearward ends of the levers, saidholders serving to maintain, through spring action, the honing stones incontact with the rotary cutters while the cutter head, carrying suchcutters, is revolved by the usual crank operated gearing.

Other objects, features and advantages will become more readily apparentfrom the following description and the accompanying illustrativedrawings.

In the drawings:

Figure 1 is a perspective view of a tool or implement constructed inaccordance with the principles of the present invention;

Figure 2 is a view in side elevation, with the holders and stones insection, showing the manner in which the tool is used;

Figure 3 is a section cut on the line 3--3 of Figure 1, looking in thedirection of the arrows with the abrading or honing stones removed;

Figure 4 is a section on the vertical line 44 of Figure 2, locking inthe direction of the arrows, certain parts of the sharpener stand beingomitted.

Referring now to the drawings by distinguishing reference numerals andattending lead lines, the levers, which are duplicates of each other,are denoted by the numerals 6 and l and are rectilinearly straight. Theyare provided intermediate their ends with lateral lugs 8 and 9operatively and pivotally connected to each other in overlappingrelation, as denoted at lil. Studs II and 12 are provided on therearward or left hand end portions of the levers and these serve toaccommodate and hold in place an expansion spring l3. The holders forthe honing or abrading stones I l are denoted by the numerals l5 and I6respectively and said holders are also duplicated in construction. Adescription of one will suilice for both. Each holder comprisessubstantially rectangular flat backing plates ll having outstandingcentrally located ears l8 to accommodate the forward end portion [9 ofthe coacting lever. The lever is pivotally mounted between the ears asat 2!). The transverse ends of the plates are provided with rightangularly disposed marginal flanges 2! which, in turn, are provided withinturned flanges 22, said flanges 22 being spring tensioned and ofsufiicient resiliency to permit the honing stones or blocks to beslipped and snapped into place. It will be noted, in this connectionthat the stones are rectangular and that two stones are mounted in eachholder and that the inner adjacent longitudinal edges of the stones arein spaced parallelism.

In practice the usual shavings and dust collector casing (not shown) isremoved from the stand A of the pencil sharpener to uncover and exposethe revolvable cutter head B turned by the customary hand crank C. Thecrank, when rotated, imparts the usual planetary action to the rotaryfrusto-conical cutters D. With the cutter head uncovered, as shown inFigure 2, the levers 6 and 'l are pressed together against the tensionof the spring and to open the jaw-like holders. Then, the holders arereleased and pressed by the spring means into contact with thespiral-type cutters D. Now, as the hand crank is turned and the cutterhead revolved by the usual gearing (not shown) the cutters are rotatedin wiping contact with the stones and are thus honed, in an obviousmanner. The spring is sufilclently strong to maintain the holders andbones in effective contact with the relatively rotatable cutters. Inusing the device it is desirable to rotate the crank handle in acounter-clockwise direction and generally ten to twenty turns aresufficient to transform dull cutters into sharp, reconditioned cutters.

A careful consideration of the foregoing description in conjunction withthe invention as illustrated in the drawings will enable the reader toobtain a clear understanding and impression of the alleged features ofmerit and novelty suflicient to clarify the construction of theinvention as hereinafter claimed.

Minor changes in shape, size, materials and rearrangement of parts maybe resorted to in actual practice so long as no departure is made fromthe invention as claimed.

Having described the invention, what is claimed as new is:

1. A hand sharpening implement for honing and reconditioning rotarycutters in a pencil sharpener comprising a pair of opposed complementallevers, said levers having lugs intermediate the ends of the levers,said lugs being hingedly connected with one another, spring meansinterposed and fastened between the rearward ends of said levers,duplicate holders pivotally mounted on the forward ends of said levers,and hones mounted in said holders.

2. A honing device for sharpening twin cutters of a conventional-typepencil sharpener comprising a pair of levers pivotally connected to oneanother intermediate their ends, and duplicate complemental holder forabradant elements hingedly mounted for operation on the forward ends ofsaid levers, each holder comprising a fiat, rectangular backing platehaving transverse end flanges carrying laterally inturned flanges, thelatter opposed to said plate and being resilient whereby to affordclamping and retaining facilities for honing stones, and spring meansmounted between said levers and serving to resiliently clamp saidholders in operative positions when in use.

7 3. A device for resharpening twin cutters in a cutter head of aconventional-type pencil sharpener comprising a pair of duplicate stoneholders, each holder embodying a substantially flat rectangular backingplate having transverse angularly disposed flanges provided withauxiliary flanges, the auxiliary flanges being resilient and directedtoward each other and underlying the backing plate, the exterior side ofthe central region of said plate being provided with outstanding spacedparallel ears, a pair of duplicate levers, the forward ends of saidlevers being pivotally mounted between the ears on the respectiveholders, the intermediate portions of said levers being provided withlateral lugs, said lugs being overlapped and pivotally connectedtogether, the rearward ends of said levers having opposed studs, and acoiled spring interposed between the rearward ends of the levers andanchored in place at its opposite ends on said studs.

4. A device for resharpening twin cutters in a cutter head of aconventional-type pencil sharpener comprising of duplicate stoneholders, each holder embodying a substantially fiat rectangular backingplate having transversely disposed end flanges, certain of the flangesbeing resilient and directed toward each other and being opposed to thebacking plate, the exterior side of the'central region of each platebeing provided with outstanding ears, a pair of duplicate levers, theforward ends of said levers being pivotally connected with the ears onthe respective backing plates, the intermediate portions of said leversbeing pivotally connected to each other, the rearward ends of saidlevers having opposed studs, and a coil spring interposed between saidrearward ends and held in place by said studs.

WILLIAM H. FRYAR.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,130,695 Allen Mar. 9, 19151,173,627 Whitcomb Feb. 29, 1916 1,436,825 Sanford Nov. 28, 19222,197,891 Kriechbaum Apr. 23, 1940

